“Guardians of the Galaxy” Already Cleaning Up at the Box Office

Marvel has a certified summer blockbuster on its hand with Guardians of the Galaxy. The sci-fi feature, which stars Zoe Saldana and Chris Pratt, grossed $11.2 million during its Thursday evening premiere, Variety said Friday. The feat makes Guardians the biggest August opener, edging out previous title-holder The Bourne Ultimatum. Guardians hasnotched the largest pre-opening…